import re

buf = bytearray() 


text = "Disp Prompt Disp Disp"
token = re.split(r"(\W+)", text)
tokens = []

for i in token:
 if (i == " " and token != []):
  tokens[len(tokens)-1] += i
 else:
  tokens.append(i)

finaltext=""

disp = "Disp "
prompt = "Prompt "

for i in tokens:
 if (i == disp):
  finaltext += "$DE"
  buf.append(0xde)
 if (i == prompt):
  finaltext += "$DD"
  buf.append(0xdd)

print finaltext


raw_input()

Traceback (most recent call last):
  Line 3, in <module>
    buf = bytearray() 
NameError: name 'bytearray' is not defined